[填空题]Strong emotions can make it hard to think and to solve problems. They may prevent a person from learning or paying attention to what he is doing. ______ The worry drains valuable mental energy he needs for the examination.

• A. Emotions, however, may be weak or strong.
• B. In order to feel happy, the person may choose unusual ways to avoid the emotion.
• C. An emotion does not have to be created by something in the outside world.
• D. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion.
• E. For example, a student taking an examination may be so worried about failing that he cannot think properly.
• F. Negative emotions make a person unhappy or dissatisfie

[单项选择]Anger and other strong emotions can trigger potentially deadly heart rhythms in certain vulnerable people.
Previous studies have shown that earthquakes, war or (62) the loss of a World Cup Soccer match can increase (63) of death from a sudden cessation(停止) of heartbeat, (64) the heart stops circulating blood. "It’s (65) been shown in all different ways that when you put a whole (66) under a stressor that sudden death will increase," said Dr. Rachel Lampert, whose study (67) in the Journal of the American College of Cardiology. "Our study starts to look (68) how this really affects the electrical system of the heart," Lampert said.
She and colleagues studied 62 patients with heart (69) and implantable heart defibrillators (电震发生器) or ICDs that can (70) dangerous heart rhythms or arrhythmias(心律失常) and deliver an electrical shock to restore a normal heart (71) . "These
A. percentage
B. ratios
C. amount
D. rates